640093411 has 4 divisors (see below), whose sum is σ = 649647112. Its totient is φ = 630539712.

The previous prime is 640093403. The next prime is 640093417. The reversal of 640093411 is 114390046.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 114390046 = 2 ⋅57195023.

It is a cyclic number.

It is not a de Polignac number, because 640093411 - 2³ = 640093403 is a prime.

It is a super-2 number, since 2×640093411² = 819439149611229842, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 640093411.

It is not an unprimeable number, because it can be changed into a prime (640093417) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4776750 + ... + 4776883.

It is an arithmetic number, because the mean of its divisors is an integer number (162411778).

Almost surely, 2^640093411 is an apocalyptic number.

640093411 is a deficient number, since it is larger than the sum of its proper divisors (9553701).

640093411 is an equidigital number, since it uses as much as digits as its factorization.

640093411 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9553700.

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 640093411 is about 25300.0674109774. The cubic root of 640093411 is about 861.8158006187.

The spelling of 640093411 in words is "six hundred forty million, ninety-three thousand, four hundred eleven".